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    <title>Document</title>
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<style>
.bs{background-color:black;

}
.bs h1,p{color: white;}
</style>
<body>

    <div class="container">
        <div class="row">
            <div class="col-md-6">
                <div class="input-group">
                    <input type="text" class="form-control" placeholder="Search Our Website & Produts">
                    <span class="input-group-btn">
                        <button class="btn btn-primary">搜索</button> </span>
                </div>
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    <div class="container" id="summary-container">
        <div class="row">
            <div class="col-md-4 span3 bs">
                <h1>Sleek</h1>
                <p>Lorem ipsum dolor sit amet,consectetur adipiscing elit.Aenean pharetra vanus maxirnus.Cras condimentum porttitor enim a egestas.Suspendisse potenti</p>
                <button type="button" class="btn btn-default">Read More</button>
            </div>
            
            <div class="col-md-4 span3 bs">
                <h1>Responsive</h1>
                <p>Lorem ipsum dolor sit amet,consectetur adipiscing elit.Aenean pharetra vanus maxirnus.Cras condimentum porttitor enim a egestas.Suspendisse potenti</p>
                <button type="button" class="btn btn-default">Read More</button>
            </div>
            <div class="col-md-4 span3 bs">
                <h1>Clean</h1>
                <p>Lorem ipsum dolor sit amet,consectetur adipiscing elit.Aenean pharetra vanus maxirnus.Cras condimentum porttitor enim a egestas.Suspendisse potenti</p>
                <button type="button" class="btn btn-default">Read More</button> 
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